Beneath the waves lies a world so vast, dark, and extreme that humans cannot reach it alone. In this episode of Saltwater Stories, we explore the cutting-edge machines that are changing how we study the ocean. Meet AUVs and ROVs, autonomous and remotely operated vehicles built to dive where divers cannot. These robots are mapping shipwrecks, studying melting ice shelves, detecting underwater plumes, and even preparing for missions beyond Earth. From delicate archaeology to high-stakes disaster response, they are helping scientists unlock the ocean’s most guarded secrets. Join us as we explore the tools, missions, and future of robotic ocean exploration.